Investigators said 82-year-old John J. Hanson of Castleton-on-Hudson, N.Y., was killed after being run over by a piece of construction equipment around 7:30 a.m. Hanson, a subcontractor, was pronounced dead at the scene, according to District Attorney David F. Capeless.

Authorities did not release much information about the victim, but Hanson is reportedly affiliated with a soil testing service company on South Main Street in Castleton, which is how locals refer to the Hudson River town south of Albany.

Williamstown police and rescue personnel responded to the incident, which is under investigation by town police and state police detectives assigned to Capeless' office. The incident also is being probed by the federal Occupational Safety and Health Administration.

According to The Berkshire Eagle, The Clark, as the fine art museum is commonly called, is undergoing a multiphase expansion of its South Street facilities, designed by renowned architect Tadao Ando.